The Apple Watch SE 3 delivers advanced health and fitness features at an exceptional value. Crafted from 100% recycled aluminum and available in Starlight or Midnight, it offers a lightweight, swimproof design with 44 mm or 40 mm case sizes. Powered by the S10 chip with a 4-core Neural Engine, it delivers smooth performance and on-device Siri processing. The Always-On Retina OLED display with Ion-X glass provides sharp visuals up to 1,000 nits brightness, while the second-generation optical heart sensor, temperature sensor, and high-g accelerometer track everything from heart rate and sleep stages to crash and fall detection. Stay active with detailed workout metrics, from running and cycling to swimming, hiking, and multisport training—plus automatic track detection and offline maps. With 5G + LTE, Wi-Fi 4, Bluetooth 5.3, and Apple Pay, you can stay connected even without your iPhone. The rechargeable battery delivers up to 18 hours of normal use or 32 hours in Low Power Mode, with fast charging to 80% in about 45 minutes. Compatible with iPhone 11 or later running iOS 26 or newer.